Panning-movement



Patented Dec. 28, 192W.

. W. P. COTTRELL.

PANNING MOVEMENT.

APPLICATION FILED FEE-2,1920.

I'II'IIII u I (20 23 I r// 'INVENTOR 7 WILLIAM P. COTTRELI.

I-IIs ATTORNEYS centratin .rren

Wll'lthfizhld @GTI'TiElLL, @li lLtllil ANG-ELES, carirroanra.

PANNING-MQVEMENQ Specification of Letters Eatent.

Patented linena 2& 192th Application filed Eebruary 2t, 1920. herial l lo. seat/ea.

To all whom it may concern:

Be it known that l, WILLIAM P. Corrnnnn, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Panning-Move merits, of which the following is a specification.

This invention 3 relates to a mechanical movement especially adapted for rifile contables, which separate minerals from the1r gangue by stratification induced by agitation moving the ore longitudinally of the riflles.

lt is an object of this invention to provide a movement adapted for a riilied table,'

whereby after each jolt of the table, the latter is given a downward movement thereby relieving the pressure of the particles of ore upon the tables surface. it is another object of this invention to provide means whereby the drop movement of the table may be adjusted. it is found that Stratification of the ore is much more eflicient when the ore is tossed from the table or the table moved from beneath the ore in its agitation that the drop movement be made adjustable to accommodate the machine to ore of various characteristics and to the depth of the riflles.

These objects will be more fully understood, as will also other objects and correspending accomplishments of my invention from the following detailed description of a preferred embodiment thereof. nor the.

purpose of this description, reference is bad to the accompanying drawing, in which:

Figure 1 is a side elevation of my improved movement applied to a table the details of the table not being shown igs 2 is an enlarged detail view of the bumper and bolder construction; and F i 3 is a section taken on the line 3--3 of ig. 2.

The bed of a concentrating table -is indicated by i. This table is of the type which is reciprocated and jolted at each vibration. A. base 5 is provided with cross beams 6. Mounted upon two of -the cross beams is a bearing block indicated by 7 and 7 in registry with the side of the table. Pivotally mounted in the bearing bloclrs are supporting links 8 and 8'. The upper ends of the supporting links. are .pivotally secured. to

hearing blocks 9 and 9 mounted upon the which has a horizontal portion 12. Adjust.

ably mounted in the channel is a louder 13 having a resilient head 14, preferably of rubber. The upper face of the bufier is inclined so as to make it wedge shaped. Embracing the bufi er'and the channel bar is a clamp 15. lt is-obviousthat the position of the buffer may be adjusted longitudinally of the channel. The bumper strikes the buifer head at each vibration of the table, and the construction is so arranged that normally the bumper is in contact with the buffer. After adjustment and fixing of the bufier to the channel bar, sliding of the bufl'er along the channel is prevented by reason of its wedge shape. Extending transversely of the table to the rear of the channel is a cross piece 16 corresponding to a bumper beam 10. Secured to the under face of the beam 16 is an angle 17, and secured to the bumper beam in a corresponding position is anangle 18. Extending between the angles and secured thereto is a rod 19. The rod slidably extends through the legs of the channel 11. Mounted upon rod 19 is a helical com res sion spring 20. The spring abuts the c an channel 11 and a washer 24: is held in position by a nut 25. By adjustment of nuts 22 and 25 the compression of the springs 20 and 23 may be adjusted.

Journaled on the. table bed a is a shaft 26, and secured to said shaft is a pulley,27. Secured to-the pulley is an eccentric 28. This eccentric serves as an overbala nce wei ht to vibrate the table. Journaled on the ase is a driving ulley 29, and passed over the pulleys 29 and 27 is a belt 30.

It is obvious that the more the supporting links 8 areinclined to the vertical, the more willbe the drop of the table u on each movement thereof in a horizontal irection.

By adjusting the position of the buffer 13,

. along the table in. an uphill direction. v

keeping bumper 10 in contact therewith, the drop of the table upon vibration may be adjusted. The larger the riffles, the greater should be the drop. After having made this adjustment, spring 20 is adjusted to hold the table without movement at the selected speed of the pulley'27. Thus, if the table is to be operated at GOO-vibrations per minute, the spring 20 should-be adjusted so that at this speed there is no vibration of the table. The compression of sprin 23 is then adjusted so as to counteract t e efiect of ward the tail end. Upon the rebound and movement of the table to the left,- it drops from beneath the ore, leaving the'latter suspended, which act produces a maximum of stratification. The amount of movement along the table is controllable by the amount of drop, so .that if suflicient drop is given the table maybeisli htly' tilted longitudinally with its tail on? higher than the head end. In this position particles will-travel lVith the links at the head end having the greater inclination, the drop at that end is greater. This is advantageous where the riflies are larger at the head end. 7

What I claim is: 1. A mechanical movement comprising the combination of a reciprocable member having a bumper, a stationary buffer, spring means normally holding said bumper in contact with said buffer, means .to support said member to permit longitudinal vibration and cause up and down movement thereof,

and means to reciprocate said member.

2. A mechanlcal movement comprising the combination of a reciprocable member having a bumper, a stationary buffer, spring means normally holding said bumper in contact with said bufler, means to support said member to permit longitudinal vibration and cause up and down movement, said means being adjustable, and means to reciprocate said member.

3. A- mechanical movement comprising the combinationof a reciprocable member having a bumper, a stationary buffer, ad-

justable spring means normally holding said bumper in'contact with said bufle'r, means to support said member to permit longitudinal vibration and cause up and down movement, said means being adjustable, and means to reciprocate said member.

4. A mechanical movement comprising the combination of a reciprocable member having a bumper, a stationary bufli'er, spring means normally holding said bumper in contact with-said buffer, supporting links for said table pivotally mounted so as to be rocked, means to adjust the normal inclination of, said links, and means to reclprocate said members.

5. A mechanical movement comprising the combination of a reciprocable member having a bumper, a stationary bufl'er adjustable longitudinally of said table, spring means normally holding said bumper in contact with said buffer, supporting links for said table pivotally -mounted so as to rock, and means to reciprocate said members.

In Witness that I claim the foregoing I have hereunto subscribed my name this 23rd day of January, 1920.

WILLIAM P. COTTRELL. 

